I/O Management and Hard Drives

Question 1

Programmed I/O refers to I/O operations that do not require external devices

Answer 1

False

Question 2

With programmed I/O, data transfer is done by instructions written in a computer program

Answer 2

True

Question 3

With programmed I/O, instructions are required to move both data from the device to the CPU and move data from CPU to device

Answer 3

True

Question 4

Programmed I/O keeps the CPU busy needlessly by constantly monitoring through the use of a:

Answer 4

Loop

Question 5

With interrupt driven I/O, a device such as a mouse or keyboard causes an I/O operation to occur. Therefore that is the premise of interrupt driven I/O

Answer 5

False

Question 6

With interrupt driven I/O, the setting of an interrupt flag is what informs the CPU that an interrupt has been issued

Answer 6

True

Question 7

When an I/O interrupt is issued, what does the CPU do? (Respond, Transfer, Deviate)

Answer 7

Deviate from what its doing to respond to the I/O transfer

Question 8

The DMA controller is the CPU’s way of accessing data from I/O operations without having to directly place all the data into main memory.

Answer 8

False. DMA allows I/O devices to directly access memory.

Question 9

The DMA controller is a hardware that allows I/O devices to directly access memory with less participation by the processor

Answer 9

True

Question 10

The DMA controller reduces the data transfer overhead from the CPU

Answer 10

True